PR.registerLangHandler(PR.createSimpleLexer([
  ["pln", /^[\t\n\r \xa0]+/, null, "\t\n\r �\xa0"],
  ["com", /^#(?:if[\t\n\r \xa0]+(?:[$_a-z][\w']*|``[^\t\n\r`]*(?:``|$))|else|endif|light)/i, null, "#"],
  ["str", /^(?:"(?:[^"\\]|\\[\S\s])*(?:"|$)|'(?:[^'\\]|\\[\S\s])(?:'|$))/, null, "\"'"]
], [
  ["com", /^(?:\/\/[^\n\r]*|\(\*[\S\s]*?\*\))/],
  ["kwd", /^(?:abstract|and|as|assert|begin|class|default|delegate|do|done|downcast|downto|elif|else|end|exception|extern|false|finally|for|fun|function|if|in|inherit|inline|interface|internal|lazy|let|match|member|module|mutable|namespace|new|null|of|open|or|override|private|public|rec|return|static|struct|then|to|true|try|type|upcast|use|val|void|when|while|with|yield|asr|land|lor|lsl|lsr|lxor|mod|sig|atomic|break|checked|component|const|constraint|constructor|continue|eager|event|external|fixed|functor|global|include|method|mixin|object|parallel|process|protected|pure|sealed|trait|virtual|volatile)\b/],
  ["lit", /^[+-]?(?:0x[\da-f]+|(?:\.\d+|\d+(?:\.\d*)?)(?:e[+-]?\d+)?)/i],
  ["pln", /^(?:[_a-z][\w']*[!#?]?|``[^\t\n\r`]*(?:``|$))/i],
  ["pun", /^[^\w\t\n\r "'\xa0]+/]
]), ["fs", "ml"]);
